So, I'm wondering about this Powercard:
http://www.powercardtuning.com/
As an engineer working in the automotive field, I find it difficult to understand how this device actually works. The only connections are for power and to each injector. There is no way that the computer can determine load from those inputs. In modern FI systems, they use a hot wire to determine mass air flow, in addition to throttle position and engine rpm, to set fuel injector duty cycle. These are truly load responsive, but our motorcycles do not have mass air flow sensors, plus many of the older ones are open loop (no O2 sensor). In older FI systems, they used a flapper door to determine mass air flow.
So, people report positive results with this device, but do not believe it is load responsive. In a fixed map system the injector duty cycle does not change with load, so I have no idea how this Powercard can determine load or even respond to it. The device is manually adjustable, so maybe it's just a device that controls fuel injector duty cycle and nothing more.
http://www.powercardtuning.com/
As an engineer working in the automotive field, I find it difficult to understand how this device actually works. The only connections are for power and to each injector. There is no way that the computer can determine load from those inputs. In modern FI systems, they use a hot wire to determine mass air flow, in addition to throttle position and engine rpm, to set fuel injector duty cycle. These are truly load responsive, but our motorcycles do not have mass air flow sensors, plus many of the older ones are open loop (no O2 sensor). In older FI systems, they used a flapper door to determine mass air flow.
So, people report positive results with this device, but do not believe it is load responsive. In a fixed map system the injector duty cycle does not change with load, so I have no idea how this Powercard can determine load or even respond to it. The device is manually adjustable, so maybe it's just a device that controls fuel injector duty cycle and nothing more.